# import Dog as dog
#
#
# do = dog.DCog('旺财',21)
# do1 = dog.DCog('旺财',21)
# del do1
# do1 = do
# print(do)
# print(do1)
# print(do == do1)
# print(do.eat())
# # 给类里的age赋值
# do.age = 22
# print(do.eat())
#
# c = 2+1j
# print(type(c))
# print(f'{do.age:do.age+=1}')
# print(do.age)
a = 2
b = 5
a,b = b,a+b
print(a,end=',')
print(b)